mr. obama referred to mandela by his south african name of endearment. madiba. >> madiba's words give us a compass in a sea of change. >> with mandela's passing, the president said others must now hold his moral compass. >> it falls to us as best we can to form the example that he set. to make decisions guided not by hate, but by love. never discount the difference that one person can make, to strive for a future worthy of his sacrifice. >> president obama will travel to south africa for services for mandela and is expected to be one of many world leaders asked to eulogize the political prisoner who became president. >> colin powell witnessed an historic moment when mandela was sworn in. mandela's leadership that day set his country on a path to unity and inspired the world. the former secretary of state is in washington. general powell, good morning. >> good morning, charlie, how are you? >> remember the inauguration for us and why it's so touched you. >> i'll never forget it. it was a remarkable day. we were all assembled in front of the union halls an